基于DPCA方法的传感器故障检测与诊断

针对多传感器的相关时序测量数据，在假设只存在传感器故障的前提下，提出了一种基于动态主成分分析（DPCA）的传感器故障检测方法。根据测量数据建立传感器的DPCA模型，在该模型基础上利用T2和SPE统计量进行传感器的故障检测。同时，将基于主成分分析（PCA）模型的传感器有效度指标SVI推广应用于DPCA模型中。通过对污水处理系统中重要传感器的故障诊断仿真实验表明：该方法能有效地检测和识别出故障传感器。

Fault detection and diagnosis for sensors based on DPCA

In order to deal with the time series data from muhiple sensors,a fault detection approach based on dynamic principal component analysis(DPCA)is proposed.With this approach,normal samples are used as training data to develop a DPCA model.T~2 statistic and SPE statistic are used to detect fault.SVI statisticperformed as indexes of fault sensor diagnosis.Several simulations in sewage disposal system are used to validate the DPCA.The results show that the DPCA model can effectively extract the dynamic relations among process variables and sensor fault detection.